What temperature condition could potentially alter the best practice for assembling joints?

When assembling joints in pipe fitting, cold temperatures can significantly affect the materials and the process. In colder conditions, the expansion and contraction of substances may alter the fit of the joints, potentially leading to leaks or improper connections. Materials such as metal can become more brittle and less ductile, making them difficult to work with. Additionally, certain adhesives and sealants may not cure properly or attain their intended strength when applied in low-temperature environments.

It's important to follow best practices for assembly, which may include pre-heating materials, using different types of fittings that accommodate colder temperatures, or adjusting the methods of application for sealants or adhesives. Understanding these temperature-related challenges helps ensure that joints are assembled correctly and perform well under the expected service conditions.